What’s Vulnerable › Vulnerabilities

CVE-2020-7965

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-29 · updated 2026-06-17
• Weakness: CWE-352

Description

flaskparser.py in Webargs 5.x through 5.5.2 doesn't check that the Content-Type header is application/json when receiving JSON input. If the request body is valid JSON, it will accept it even if the content type is application/x-www-form-urlencoded. This allows for JSON POST requests to be made across domains, leading to CSRF.

Affected products

• Webargs Project Webargs: from 5.0.0 through 5.5.2

References

• https://webargs.readthedocs.io/en/latest/changelog.html
• https://webargs.readthedocs.io/en/latest/changelog.html

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